Skip to content

Course home

Sign up

4.2 Uses of magnetism

EasyMediumHard
123456789101112131415
Question 15
H

Which statement describes how a dynamic microphone produces a current?

[1]
A

A current in a coil in a magnetic field makes a cone vibrate and produce sound waves

B

Sound waves heat a coil in a magnetic field, so the resistance of the coil changes

C

Sound waves make a coil move in a magnetic field, so a potential difference is induced

D

Sound waves carry charge into the coil, and this charge then flows around the circuit

Markscheme

4.2 Uses of magnetism Questions

  1. GCSE
  2. /Physics
  3. /4.2 Uses of magnetism

48 exam-style questions on OCR GCSE Physics 4.2 Uses of magnetism, covering 4.2.1 The motor effect, 4.2.2 Fleming's left-hand rule, 4.2.3 The force on a current-carrying conductor, 4.2.4 The electric motor, 4.2.5 Electromagnetic induction, 4.2.6 Alternators and dynamos, 4.2.7 How transformers work, 4.2.8 Transformer turns ratio, 4.2.9 Potential differences and turns in transformers, and 4.2.10 Microphones, loudspeakers and headphones. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank